Hollywood producer Hawk Koch has replaced Tom Sherak as president of the Academy of Motion Picture Arts and Sciences.The movie boss, whose credits include the Wayne's World comedies and Jake Gyllenhaal's action thriller Source Code, will be tasked with producing the 2013 Academy Awards during his year-long post in the unpaid role. Koch, who is also the current co-president of the Producers Guild of America, is the 32nd person to serve as Academy president.